Relocate ServiceInfo models (#2532)

blog/2025-01-15-service-info.md

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+---
+author: epenet
+authorURL: https://github.com/epenet
+title: "Relocate dhcp/ssdp/usb/zeroconf ServiceInfo models"
+---
+
+### Summary of changes
+
+To reduce current reliance on optional integrations for names that are in essence used as helpers, the following ServiceInfo models have been relocated:
+- `DhcpServiceInfo` from `homeassistant.components.dhcp` to `homeassistant.helpers.service_info.dhcp`
+- `SsdpServiceInfo` from `homeassistant.components.ssdp` to `homeassistant.helpers.service_info.ssdp`
+- `UsbServiceInfo` from `homeassistant.components.usb` to `homeassistant.helpers.service_info.usb`
+- `ZeroconfServiceInfo` from `homeassistant.components.zeroconf` to `homeassistant.helpers.service_info.zeroconf`
+
+
+To update your integration:
+1. Replace the import statements as shown in the examples below
+2. Test your integration with the new imports
+
+The old import locations are deprecated and will be removed in Home Assistant 2026.2.
+
+
+### Examples
+
+```python
+# Old
+# from homeassistant.components.dhcp import DhcpServiceInfo
+# from homeassistant.components.ssdp import SsdpServiceInfo
+# from homeassistant.components.usb import UsbServiceInfo
+# from homeassistant.components.zeroconf import ZeroconfServiceInfo
+
+# New
+from homeassistant.helpers.service_info.dhcp import DhcpServiceInfo
+from homeassistant.helpers.service_info.ssdp import SsdpServiceInfo
+from homeassistant.helpers.service_info.usb import UsbServiceInfo
+from homeassistant.helpers.service_info.zeroconf import ZeroconfServiceInfo
+
+class MyConfigFlow(ConfigFlow, domain=DOMAIN):
+    """Handle a config flow."""
+
+    async def async_step_dhcp(self, discovery_info: DhcpServiceInfo) -> ConfigFlowResult:
+        """Handle dhcp discovery."""
+        ...
+
+    async def async_step_ssdp(self, discovery_info: SsdpServiceInfo) -> ConfigFlowResult:
+        """Handle ssdp discovery."""
+        ...
+
+    async def async_step_usb(self, discovery_info: UsbServiceInfo) -> ConfigFlowResult:
+        """Handle usb discovery."""
+        ...
+
+    async def async_step_zeroconf(self, discovery_info: ZeroconfServiceInfo) -> ConfigFlowResult:
+        """Handle zeroconf discovery."""
+        ...
+```